Crime scene technician Diana Smith says she tested for DNA after the shooting, and Zimmerman's gun did not show evidence of "touch DNA" from Martin. On cross-examination, she said it was possible that touch DNA could be wiped off of an object.

Orlando Sentinel/Pool Photo

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Crime scene tech says she tested gun, Skittles, iced tea for DNA

Crime scene technician Diana Smith says she tested for DNA after the shooting, and Zimmerman's gun did not show evidence of "touch DNA" from Martin. On cross-examination, she said it was possible that touch DNA could be wiped off of an object.

Orlando Sentinel/Pool Photo

Sanford police have turned over all of the evidence from the George Zimmerman murder trial to the FBI and the Department of Justice.